JPH037442B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION (1) Field of the Invention The present invention relates to improvements in water protection for sealing devices of the type used in rolling mill oil film bearings.

(2) Description of the prior art Figure 1 shows a conventionally developed sealing device for oil film bearings in rolling mills. In this device, the end face 12 of the roll 10 is connected to an intermediate tapered neck portion 1 against a reduced diameter portion 16 surrounded by a sleeve 18.
connected by 4. The sleeve is keyed or otherwise secured to the roll neck;
It is supported within a bushing 20 which is secured within a roll neck 22. Oil is continuously supplied to the bearing interface between the sleeve and the bushing and the sealing device 24
surrounds the intermediate tapered neck portion 14 to prevent oil from escaping from the bearing and to prevent contaminants such as cooling water and mill scale from entering the bearing.

The sealing system includes a circular flexible flange type neck seal 26 and a slinger ring 28, both of which are rotatably supported on rolls. A seal end plate 30 and a coolant seal 32 are all secured to the bearing choke 22.

A radial mounting flange 34 of the coolant seal 32 is integrally coupled at its inner edge 36 to a seal flange 38 , and from there
extends obliquely so as to be in sealing contact with the roll end surface 12. The mounting flange has holes 40 through which screws 42 projecting are threaded into the seal end plate 30. The sealing end plate has an integral circular shoulder 44 which projects axially towards the roll end face 12. The shoulder 44 also acts as a bumper against which the roll end surface may rest while the roll is extremely floating axially relative to the chock. Although the operating performance of this device is generally satisfactory, there are some drawbacks. For example, the shoulder 44 may be damaged by contact with the rotating roll end face 12. This ultimately results in the seal end plate 30 having to be replaced at significant cost to the mill owner. Furthermore, since the shoulder portion 44 protrudes axially beyond the end of the seal end plate flange 46, the overall axial length of the seal end plate casting increases unnecessarily, resulting in an associated increase in weight and cost. .

Additionally, as best shown in FIG. 2A, another drawback is that the holes 40 in the mounting flange 34
diameter d ₁ of the screw 4 to allow relative movement or "play" between the mounting flange and the screw.
This comes from the fact that it is desirable that the diameter d of ₂ be considerably larger than 2.

Thus, when installing a coolant seal of a given size to a seal end plate of a given radius R ₁ , the screw 42 will be centered in each hole 40 . However, as shown in Figure 2B, the radius of the seal end plate
If a similar sized coolant seal is used in a small bearing arrangement where R ₂ is small, the relative movement of the mounting flange 34 and its respective hole 40 will be reduced as a result of the coolant seal being bent into a small circle. and distortion,
This will occur in the thread 42. Because of this relative movement and distortion, the screw 42 may not be reliable for accurately controlling the spacing 48 between the inner edge of the coolant seal and the cylindrical surface 50 of the slinger ring 28. If this spacing is not adequate, the coolant seals and slinger rings will wear out prematurely.

SUMMARY OF THE INVENTION The present invention provides a coolant seal mounting flange that includes:
The aforementioned problem is solved by providing an integral circular bumper shoulder projecting axially toward the roll end face and an integral circular locating shoulder projecting axially oppositely into a recess in the mounting surface of the seal end plate. .

The bumper shoulder replaces the traditional shoulder on the seal end plate. The seal end plate is thus safely protected from damaging contact with the roll end face. Furthermore, the axial length is further reduced, which leads to a reduction in weight and cost. Bumper shoulder wear caused by contact with roll end faces is not a significant effect since coolant seals are a low cost and easy substitute.

Oppositely projecting locating shoulders cooperate with recesses in the mounting surface of the seal end plate to accurately position the inner edge of the coolant seal regardless of the relative position of the mounting screws within each hole in the mounting flange. provide a means of positioning Therefore, it is possible to prevent premature wear of coolant seals and slinger rings, and it is also applicable to a large number of bearings of various diameters.
without sacrificing the benefits of having two coolant seals.

These objects and advantages of the present invention will become apparent from the following description in conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 3, the improved coolant seal 52 of the present invention is provided between the end face 54 of the roll 56 and the seal end plate 58 of the sealing device 60. . As in the conventional device shown in FIG.
The tapered intermediate portion 62 of the roll is connected to the sleeve 66
The sleeve 6 is connected to a reduced diameter portion 64 surrounded by
6 is a bush 68 housed in the bearing chock 70.
It is supported so that it rotates inside. The lubricating oil
During operation of the rolling mill, it is continuously supplied between the bearing interface of the sleeve 66 and the bush 68. In addition to the seal end plate 58 and the coolant seal 52, the seal 60 includes a slinger ring 72 and a circular resilient flange type neck seal 74, both of which rotate with the roll 56.

Radial attachment surface 76 of seal end plate 58
are axially disposed in the plane of the tip 78 of the shoulder 80. The mounting surface includes a circular recess 82 with a conical contact surface 84.

4-6, the coolant seal 52 has a radially disposed mounting flange 86 which is integrally coupled at an inner edge 88 to a sealing flange 90. 90 flexibly extends diagonally therefrom. Mounting screws 94 extend through a series of holes 92 in mounting flange 86 and are threaded into circumferentially spaced holes in mounting surface 76 of seal end plate 58 .

For the reasons explained with respect to the prior art shown in FIGS. 1-2B, the diameter of hole 92 is again smaller than that of screw
4 in diameter.

An integral circular bumper shoulder 96 of the mounting flange 86 projects axially therefrom toward the roll end surface 54. A bumper shoulder 96 extends axially outwardly beyond the tip 78 of the seal end plate shoulder 80 and the bumper shoulder 96 cooperates with the mounting flange 86 forming an open recess 98 . When the roll 56 floats axially toward the chock 70, the sealing system components and internal bearing components are protected against damage by the bumper shoulder 96. That is, bumper shoulder 96 engages roll end surface 54 and thus acts as a stop. This engagement is illustrated in FIG. In this state, the sealing flange 90 is flexibly pressed into the recess 98 by the end face of the roll, and the seal flange 90 is flexibly pressed into the recess 98
are suitably dimensioned to safely receive flange 90.

The bumper shoulder 96 is connected to the rotating roll end surface 54.
It is subject to wear due to contact with However, this is a relatively minor problem compared to wear on the bumper shoulder of the seal end plate. Because the water shield is
This is because it is a relatively inexpensive part that can be easily replaced. Preferably, as shown in FIG. 6, the bumper shoulder is double-faced at a spaced apart location 100 to provide a means for easily observing the extent of shoulder wear.
This makes it easier for rolling mill maintenance personnel to recognize bearing axial positioning problems.

The mounting flange 86 further includes a pair of circular locating shoulders 102 that project axially in an opposite direction from the bumper shoulders 96. The locating shoulder is received within a recess 82 in the mounting surface 76 of the seal end plate. A conical surface 104 of shoulder 102 slidably contacts a corresponding conical surface 84 of recess 82 . When the mounting screws 94 are tightened, the mounting flange 8
6 is pressed against the mounting surface 76 of the seal end plate, the conical surfaces 84, 104 cooperate to force the outer cylindrical surface 106 of the locating shoulder 102 radially relative to the inner cylindrical surface 108 of the recess 82. Have them sit down. Precise positioning can thus be achieved to provide the necessary radial spacing 110 (see FIG. 3) between the coolant seal and the cylindrical surface 112 of the slinger ring 72. In other words, locating shoulder 102 cooperates with recess 82 to radially position mounting flange 86 on mounting surface 76 . And this is the mounting flange 8
This occurs regardless of the positional relationship of the mounting screws 94 in each hole 92 of 6. Multi-surface contact between the coolant seal and seal end plate surfaces 76, 84, 108 is possible due to the resilient nature of the coolant seal. It is contemplated within the scope of the present invention to use various forms of axial projections in place of the circular shoulders 96, 102 disclosed herein. It is also possible to change the shape and angular relationship of the mounting flange and sealing flange. It is possible to improve and modify the embodiments selected for the purpose of disclosure without departing from the scope of the claims, and these are also within the scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a rolling mill oil film bearing device employing a conventional sealing device and coolant seal. 2A and 2B are partial cross-sectional views taken along line 2--2 of FIG. 1, illustrating the use of the same coolant seal with different sized seal end plates. FIG. 3 is a partial sectional view of a rolling mill oil film bearing employing the coolant seal of the present invention. FIG. 4 is an enlarged view showing the state of the coolant seal, and shows the state in which the bumper shoulder of the coolant seal is in contact with the end surface of the roll. FIG. 5 is an exploded cross-sectional view of the coolant seal and seal end plate, and FIG. 6 is a partial bottom view of the coolant seal.

Claims (1)

[Claims] 1. A roll neck is provided with a sleeve rotatably supported within a bush housed in a bearing chock,
During operation of the rolling mill, an oil film is maintained between the sleeve and the bush to prevent oil from escaping from the bearing chock and to prevent cooling water, mill scale, etc. from entering the bearing chock. A sealing device is arranged between the end face of the roll and the bearing choke, and the sealing device is provided with a circular sealing end plate, and the sealing end plate has a circular flexible flange type neck seal attached to the roll neck so as to rotate with the roll neck. A circular coolant seal for use in a rolling mill, the seal being fixed to a bearing chock in an encircling position and having a circular mounting surface on said seal end plate axially spaced from the end face of the roll; The material seal has a radially disposed mounting flange integrally joined at an inner edge thereof with a sealing flange, the sealing flange flexibly extending diagonally from said inner edge. and a mounting device for removably securing the mounting flange to the mounting surface at a location where the sealing flange is brought into frictional contact with the roll end surface, the mounting flange comprising:
A bumper member is integrally provided projecting axially therefrom towards the roll end face, said bumper member cooperating with said mounting flange to form a recess, said bumper member projecting axially towards said roll end face when said bumper member engages said roll end face. A rolling mill characterized in that a seal flange is flexibly pushed into the recess by the end face of the roll. 2. The coolant seal of claim 1, wherein the bumper member has a circular shoulder. 3. The coolant seal according to claim 2, wherein the circular shoulder is double-cut at circumferentially spaced positions to indicate the degree of wear of the shoulder. material seal. 4. The coolant seal of claim 1, wherein the attachment device comprises a plurality of circumferentially spaced screws extending through holes in the attachment flange and connecting the attachment surface to the attachment surface. a coolant seal that is screwed into a hole in the mounting flange, the diameter of the hole in the mounting flange being sized to allow relative lateral movement of the screw therein; 5. In the coolant seal according to claim 1, the mounting flange further integrally includes a positioning member, the positioning member protruding axially in a direction opposite to the bumper member, and the mounting surface a coolant seal having a recess configured to receive and cooperate with the locating member to radially position the mounting flange on the mounting surface. 6. The coolant seal according to claim 5, wherein the positioning member comprises a circular shoulder. 7. A coolant seal according to claim 6, wherein the circular shoulder and the recess in the mounting surface have mutually engageable conical surfaces, and the mounting flange is secured by the mounting device. a coolant seal such that, when secured to the mounting surface, the conical surfaces cooperate to seat the outer cylindrical surface of the shoulder radially against the inner cylindrical surface of the recess; . 8. A sleeve rotatably supported within a bush housed in a bearing chock is provided in the roll neck,
During operation of the rolling mill, an oil film is maintained between the sleeve and the bush to prevent oil from escaping from the bearing chock and to prevent cooling water, mill scale, etc. from entering the bearing chock. A sealing device is disposed between the end face of the roll and the bearing choke, and the sealing device is provided with a circular sealing end plate, and the sealing end plate has a circular flexible flange type neck seal attached to the roll neck so as to rotate with the roll neck. A circular coolant seal for use in rolling mills fixed to a bearing chock in an encircling position and having a circular mounting surface on said seal end plate axially spaced from the roll end face, said cooling The material seal has a radially disposed mounting flange integrally joined at an inner edge thereof with a sealing flange, the sealing flange flexibly extending diagonally from said inner edge. an attachment device for removably securing the attachment flange to the attachment surface at a location that brings the sealing flange into abrasive contact with a roll end surface, the attachment device having a plurality of circumferentially spaced screws; the screw is threaded into the mounting surface, the diameter of the hole is sized to allow relative lateral movement of the screw within the hole, and a locating member integral with the mounting flange is configured to axially protruding toward the mounting surface, the mounting surface having a recess configured to receive and connect the locating member for radially positioning the mounting flange on the mounting surface. Coolant seals designed to work together. 9. The coolant seal according to claim 8, wherein the recess in the positioning member and the mounting surface is circular. 10. A coolant seal according to claim 9, wherein the recess in the locating member and the mounting surface are provided with mutually engaging conical surfaces so that when the screw is tightened, the recess A coolant seal, the conical surface being adapted to cooperate to radially seat the outer cylindrical surface of the positioning member against the inner cylindrical surface of the recess.